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Finding the Fourth Proportional to 261,054.88, 391,390.80 and 83,459.68

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Solution

The fourth proportional to 261,054.88, 391,390.80 and 83,459.68 is: 125,128.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,054.88 : 391,390.80 = 83,459.68 : x
  2. Step 2: Convert to fraction form
    261,054.88/391,390.80 = 83,459.68/x
  3. Step 3: Cross multiply
    261,054.88x = 391,390.80 × 83,459.68
  4. Step 4: Simplify right side
    261,054.88x = 32,665,350,922.94
  5. Step 5: Solve for x
    x = 32,665,350,922.94/261,054.88
  6. Step 6: Final answer
    x = 125,128.29

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.